'Commission' meant 'an entrusting' — from Latin 'committere,' the root behind 'mission' and 'missile.'
An instruction, command, or duty given to a person or group; a group of people entrusted with a specific function; a fee paid to an agent for a transaction.
From Old French 'commission,' from Latin 'commissiōnem' (accusative of 'commissiō,' a joining together, an entrusting), from 'commissus,' past participle of 'committere' (to bring together, to entrust, to connect, to perpetrate), from 'com-' (together, with) + 'mittere' (to send, to let go, to release), from PIE *meyth₂- (to exchange, to remove). The word combines the ideas of sending and togetherness — an entrusting, a placing of authority in someone's hands. The Latin verb 'mittere' is one of the most productive
The words 'commission,' 'committee,' and 'commit' are triplets — all from Latin 'committere' (to bring together, to entrust). A 'commission' is the act of entrusting. A 'committee' is the group entrusted. To 'commit' is to entrust (as in 'commit to memory' — entrust something to your memory) or to 'bring together' in the sense of performing an act ('commit a crime' — bring about an offense).